Pre-Built Standard Coils by FreshCoils are pre made sub ohm coils for use with tanks that utilize rebuildable heating elements including RDA's, RTA's and RDTA's as well as some of the leading Sub Ohm Tanks on the market that offer a rebuildable base option. These vape coils are constructed from 24 AWG Kanthal A1 wire (FeCrAl) and feature 6 total wraps to create a 0.5 ohm build. The Pre-made standard coils from FreshCoils also feature a 3mm diameter that that allows you to install an abundant amount of wick and they can be used with tanks that utilize single, dual, or quad coil configurations.